CN106330333B - Optical module - Google Patents
Optical module Download PDFInfo
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- CN106330333B CN106330333B CN201510520810.4A CN201510520810A CN106330333B CN 106330333 B CN106330333 B CN 106330333B CN 201510520810 A CN201510520810 A CN 201510520810A CN 106330333 B CN106330333 B CN 106330333B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
- H01S5/068—Stabilisation of laser output parameters
- H01S5/0683—Stabilisation of laser output parameters by monitoring the optical output parameters
- H01S5/0687—Stabilising the frequency of the laser
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/04—Processes or apparatus for excitation, e.g. pumping, e.g. by electron beams
- H01S5/042—Electrical excitation ; Circuits therefor
- H01S5/0428—Electrical excitation ; Circuits therefor for applying pulses to the laser
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/106—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity
- H01S3/107—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using electro-optic devices, e.g. exhibiting Pockels or Kerr effect
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
- H01S5/062—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying the potential of the electrodes
- H01S5/0625—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium by varying the potential of the electrodes in multi-section lasers
- H01S5/06255—Controlling the frequency of the radiation
- H01S5/06256—Controlling the frequency of the radiation with DBR-structure
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
- H01S5/068—Stabilisation of laser output parameters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
- H01S5/068—Stabilisation of laser output parameters
- H01S5/0683—Stabilisation of laser output parameters by monitoring the optical output parameters
- H01S5/06832—Stabilising during amplitude modulation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
- H01S5/068—Stabilisation of laser output parameters
- H01S5/0683—Stabilisation of laser output parameters by monitoring the optical output parameters
- H01S5/06835—Stabilising during pulse modulation or generation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/10—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region
- H01S5/12—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region the resonator having a periodic structure, e.g. in distributed feedback [DFB] lasers
- H01S5/125—Distributed Bragg reflector [DBR] lasers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/10—Construction or shape of the optical resonator, e.g. extended or external cavity, coupled cavities, bent-guide, varying width, thickness or composition of the active region
- H01S5/18—Surface-emitting [SE] lasers, e.g. having both horizontal and vertical cavities
- H01S5/185—Surface-emitting [SE] lasers, e.g. having both horizontal and vertical cavities having only horizontal cavities, e.g. horizontal cavity surface-emitting lasers [HCSEL]
- H01S5/187—Surface-emitting [SE] lasers, e.g. having both horizontal and vertical cavities having only horizontal cavities, e.g. horizontal cavity surface-emitting lasers [HCSEL] using Bragg reflection
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/04—Processes or apparatus for excitation, e.g. pumping, e.g. by electron beams
- H01S5/042—Electrical excitation ; Circuits therefor
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Optics & Photonics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Semiconductor Lasers (AREA)
- Optical Communication System (AREA)
Abstract
The present invention provides a kind of optical module.The optical module includes: laser emitter driving chip, DBR grating, laser emitter, first resistor, first capacitor, second resistance, the second capacitor and power supply；Wherein, one end of the first resistor is connect with the differential signal output plus terminal, and the other end of the first resistor is connect with the power supply；One end of the first capacitor is connect with the differential signal output plus terminal, and the other end of the first capacitor is connect with the anode of the laser emitter；One end of the second resistance is connect with differential signal output negative terminal, and the other end of the second resistance is connect with the power supply；One end of second capacitor is connect with differential signal output negative terminal, and the other end of second capacitor is connect with the negative terminal of the laser emitter；The negativing ending grounding of the negative terminal of the laser emitter and the DBR grating；Realize the luminous power of modulation laser emitter.
Description
Technical field
The present invention relates to technical field of photo communication more particularly to a kind of optical modules.
Background technique
Growth with people to communication bandwidth requirements, intelligent acess (Fiber-to-the-x, FTTx) technology obtain
Fast development, the intelligent acess technology based on passive optical network (Passive Optical Network, PON) technology obtain
It is widely applied.
Passive optical network generally include the optical line terminal that one is installed on console for centralized control and it is mating be mounted on it is each
The optical network unit (Optical Network Unit, ONU) of customer site is provided on ONU and feeds back for modulation profile formula
The modulation circuit of the luminous signal of laser emitter (Distributed Feedback Laser, DFB), and it is sharp for driving
The luminous laser emitter driving chip of optical transmitting set.Fig. 1 is the schematic diagram of modulation circuit in the prior art.As shown in Figure 1, existing
In some PON ONU, modulation circuit includes two resistance, when the differential signal output plus terminal of laser emitter driving chip is low
Level does not modulate electric current from the anode of laser emitter and flows to laser emitter when differential signal output negative terminal is high level
Negative terminal, laser emitter issue low light signals, when laser emitter driving chip differential signal output plus terminal be high level,
When differential signal output negative terminal is low level, modulation electric current flows to the negative terminal of laser emitter from the anode of laser emitter, swashs
Optical transmitting set issues strong optical signal.
And in the passive optical network based on wavelength-division multiplex (Wavelength Division Multiplexing, WDM),
Use band Distributed Bragg Reflection (Distributed Bragg Reflector, DBR) laser emitter, DBR laser
Device be it is a kind of by input current it is of different sizes come select different wave length light laser emitter, in order to flow through DBR swash
The size of current of DBR grating in light device is stablized, and needs the negativing ending grounding of DBR grating, due to the limitation of manufacture craft, at present
When making DBR laser, the negative terminal of the negative terminal of the laser emitter in DBR laser and DBR grating is connected together and is connect
Ground provides stable low level for DBR laser, so as to accurately select the light of different wave length according to demand.DBR is swashed
For light device, if modulation electric current can be from laser emitter still using the modulation circuit comprising two resistance as shown in Figure 1
Anode is directly grounded, and modulation electric current can not be provided for DBR laser, to cannot achieve the strong light for adjusting laser emitter
It is weak.
Summary of the invention
The present invention provides a kind of optical module, to realize the modulation to the luminous power of laser emitter.
The first aspect of the invention provides a kind of optical module, comprising: laser emitter driving chip, distributed Bragg
Reflect DBR grating, laser emitter, first resistor, first capacitor, second resistance, the second capacitor and power supply；
The laser emitter driving chip includes differential signal output plus terminal and differential signal output negative terminal；The difference
Signal output plus terminal and differential signal output negative terminal are used to export the differential signal of low and high level variation；
Wherein, one end of the first resistor is connect with the differential signal output plus terminal, the first resistor it is another
End is connect with the power supply；One end of the first capacitor is connect with the differential signal output plus terminal, the first capacitor
The other end is connect with the anode of the laser emitter；
One end of the second resistance is connect with differential signal output negative terminal, the other end of the second resistance and institute
State power supply connection；One end of second capacitor is connect with differential signal output negative terminal, the other end of second capacitor
It is connect with the negative terminal of the laser emitter；The negativing ending grounding of the negative terminal of the laser emitter and the DBR grating.
Optical module provided by the invention includes: laser emitter driving chip, DBR grating, laser emitter, the first electricity
Resistance, first capacitor, second resistance, the second capacitor and power supply；Wherein, one end of the first resistor and the differential signal are defeated
Anode connects out, and the other end of the first resistor is connect with the power supply；One end of the first capacitor and the difference are believed
The connection of number output plus terminal, the other end of the first capacitor are connect with the anode of the laser emitter；The second resistance
One end is connect with differential signal output negative terminal, and the other end of the second resistance is connect with the power supply；Second electricity
One end of appearance is connect with differential signal output negative terminal, the other end of second capacitor and the negative terminal of the laser emitter
Connection；The negativing ending grounding of the negative terminal of the laser emitter and the DBR grating；When the differential signal output plus terminal is low electricity
It is flat, when the differential signal output negative terminal is high level, the first capacitor charging, the second capacitor electric discharge, the excitation
It penetrates light device and issues dim light；When the differential signal output plus terminal is high level, and the differential signal output negative terminal is low level,
The first capacitor electric discharge, second capacitor charging, the laser emitter issue strong light；To realize modulation laser hair
The luminous power of emitter.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the schematic diagram of modulation circuit in the prior art；
Fig. 2 is the schematic diagram for the optical module that the embodiment of the present invention one provides；
Fig. 3 is the schematic diagram of optical module provided by Embodiment 2 of the present invention；
Fig. 4 is the schematic diagram for the optical module that the embodiment of the present invention three provides.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
The application environment of the embodiment of the present invention is introduced first herein.In the passive optical network based on WDM, use
Be DBR laser, select different wave length light when, usually by control input DBR laser in DBR grating electricity
The size variation of stream carries out selection, therefore stablizes to flow through the size of current of DBR grating, needs the negative of DBR grating
End ground connection, due to the limitation of manufacture craft, at present when making DBR laser, by the negative of the laser emitter in DBR laser
The negative terminal of end and DBR grating connects together ground connection, if using resistance as modulation circuit, when laser emitter driving chip is worked as
Differential signal output plus terminal is low level, and when differential signal output negative terminal is high level, modulation electric current can be directly from Laser emission
The anode of device flows into the negative terminal of laser emitter, and the negative terminal of negative terminal and DBR grating due to laser emitter connects together and connects
Ground, thus be equivalent to laser emitter anode and negative terminal it is short between short circuit, cannot achieve the luminous power to laser emitter
It is modulated.The embodiment of the present invention is exactly to propose to solve this problem.
Optical module provided in an embodiment of the present invention is described in detail by specific embodiment with reference to the accompanying drawing.
Fig. 2 is the schematic diagram for the optical module that the embodiment of the present invention one provides.As shown in Fig. 2, optical mode provided in this embodiment
Block can specifically include: laser emitter driving chip, Distributed Bragg Reflection DBR grating, laser emitter, the first electricity
Resistance, first capacitor, second resistance, the second capacitor and power supply；
The laser emitter driving chip includes differential signal output plus terminal and differential signal output negative terminal；The difference
Signal output plus terminal and differential signal output negative terminal are used to export the differential signal of low and high level variation；
Wherein, one end of the first resistor is connect with the differential signal output plus terminal, the first resistor it is another
End is connect with the power supply；One end of the first capacitor is connect with the differential signal output plus terminal, the first capacitor
The other end is connect with the anode of the laser emitter；
One end of the second resistance is connect with differential signal output negative terminal, the other end of the second resistance and institute
State power supply connection；One end of second capacitor is connect with differential signal output negative terminal, the other end of second capacitor
It is connect with the negative terminal of the laser emitter；The negativing ending grounding of the negative terminal of the laser emitter and the DBR grating.
In the prior art, it is connect due to the negative terminal of laser emitter with the biasing pin of laser emitter driving chip, because
This modulation circuit can modulate the luminous signal of laser emitter by way of dc-couple, specifically, the tune of the prior art
In circuit processed, including two resistance, the differential signal output plus terminal of laser emitter driving chip by a wherein resistance and swash
The anode of optical transmitting set is connected with power supply, and differential signal exports negative terminal and connected by the negative terminal of another resistance and laser emitter,
To cooperate modulation circuit by the way that differential signal output plus terminal and output negative terminal are set to high and low level, laser is flowed through in control
The size of electric current in transmitter, so that controlling laser emitter issues strong light or dim light.
And in the present embodiment, DBR laser is in design, the negative terminal of laser emitter therein and bearing for DBR grating
End connects together ground connection, the reason of doing so, first is that since manufacture craft is needed the negative terminal of laser emitter and DBR grating
Negative terminal connects together, second is that because after ground connection the low level of DBR grating can stablize, and the low level of DBR grating is stablized, just
The size of current that DBR grating can be guaranteed to flow through is stablized, so as to by the size variation of control input current, according to demand
The light of different wave length is accurately selected, this design causes when laser emitter shines, cannot be by way of HVDC Modulation
Modulate the luminous power of laser emitter.
In the present embodiment, the characteristic that cannot be mutated using the both end voltage of capacitor can be by two in parallel in circuit
Capacitor realizes the luminous signal of modulation laser emitter.Optionally, the present invention in modulation circuit include: the first resistor,
The first capacitor, the second resistance and second capacitor.
Specifically, when laser emitter shines, it can be by the way that the differential signal of laser emitter driving chip be exported
The high and low level setting that anode and output negative terminal are set, to control the size for flowing through the electric current in laser emitter, so that control swashs
Optical transmitting set issues strong light or dim light.
Optionally, the differential signal output plus terminal is low level, when the differential signal output negative terminal is high level, institute
First capacitor charging, the second capacitor electric discharge are stated, the stimulated emission light device issues dim light；The differential signal output plus terminal is
High level, when the differential signal output negative terminal is low level, the first capacitor is discharged, and second capacitor charging is described
Laser emitter issues strong light.
Specifically, when above-mentioned differential signal output plus terminal is low level, first capacitor and differential signal are exported just at this time
The connected one end in end is low level, and due to the characteristic that the level at capacitor both ends cannot be mutated, at this time the other end of first capacitor
It also is low level, and the anode of laser emitter is high level, therefore can be charged at this time to first capacitor, entire modulation electric current
Flow direction is to flow into first capacitor from power supply, pours into differential signal output plus terminal；Meanwhile differential signal output negative terminal is high level,
The second capacitor both ends are also high level at this time, and the negativing ending grounding of laser emitter, therefore are low level, and the second capacitor is put at this time
Electricity, the negativing ending grounding of laser emitter then modulate electric current and directly arrive ground, do not modulate electric current and flow through laser emitter, therefore this
When laser emitter issue dim light.
When above-mentioned differential signal output plus terminal is high level, first capacitor is connected with differential signal output plus terminal at this time
One end is high level, and due to the characteristic that the level at capacitor both ends cannot be mutated, the other end of first capacitor is also high electricity at this time
It is flat, and the anode of laser emitter is low level, therefore first capacitor is discharged at this time, modulates anode of the electric current from laser emitter
It flows into, is flowed out from the negative terminal of laser emitter, the modulation circuit flowed out from laser emitter negative terminal is divided into two-way, gives second all the way
Capacitor charging, another way flow into ground；Meanwhile differential signal output negative terminal is low level, the second capacitor both ends are also low electricity at this time
Flat, the second capacitor charging, has modulation electric current to flow through laser emitter, therefore laser emitter issues strong light at this time at this time at this time.
In the present embodiment, when realizing the modulation of luminous signal of laser emitter, pass through the charging of coupled capacitor, electric discharge
To realize；That is, in above-mentioned modulation circuit, when above-mentioned laser emitter shines, by the way that above-mentioned differential signal is exported
Anode is set to high level, above-mentioned differential signal output negative terminal is set to low level, alternatively, above-mentioned differential signal output plus terminal is set
For low level, above-mentioned differential signal output negative terminal is set to high level, the luminous signal to above-mentioned laser emitter can be realized
It is the modulation of " 1 " or " 0 ".
Optical module provided in this embodiment, may include: laser emitter driving chip, DBR grating, laser emitter,
First resistor, first capacitor, second resistance, the second capacitor and power supply；Wherein, the laser emitter driving chip includes poor
Sub-signal output plus terminal and differential signal export negative terminal；The differential signal output plus terminal and differential signal output negative terminal are used
In the differential signal of output low and high level variation；Wherein, one end of the first resistor and the differential signal output plus terminal connect
It connects, the other end of the first resistor is connect with the power supply；One end of the first capacitor and the differential signal export just
End connection, the other end of the first capacitor are connect with the anode of the laser emitter；One end of the second resistance and institute
Differential signal output negative terminal connection is stated, the other end of the second resistance is connect with the power supply；One end of second capacitor
It is connect with differential signal output negative terminal, the other end of second capacitor is connect with the negative terminal of the laser emitter；Institute
State the negative terminal of laser emitter and the negativing ending grounding of the DBR grating；When the difference of the laser emitter driving chip of optical module
Signal output plus terminal is low level, and when differential signal output negative terminal is high level, first capacitor charging, the second capacitor electric discharge swashs
Emit light device and issues dim light；When differential signal output plus terminal is high level, and differential signal output negative terminal is low level, the first electricity
Discharge capacitor, the second capacitor charging, laser emitter issue strong light；To realize the luminous power of modulation laser emitter.
Fig. 3 is the schematic diagram of optical module provided by Embodiment 2 of the present invention.As shown in figure 3, on the basis of above-described embodiment
On, in order to which low-frequency noise signal is isolated, optical module provided in this embodiment further can also include: 3rd resistor and/or
Four resistance；
Wherein, the 3rd resistor is arranged between the first capacitor and the differential signal output plus terminal, and described the
The setting of four resistance is between second capacitor and differential signal output negative terminal.Optionally, the 3rd resistor and described
The Standard resistance range of 4th resistance is 0ohm~15ohm, and the present embodiment is not particularly limited this.
Optionally, it can only further include 3rd resistor in the modulation circuit of the present embodiment, or only further include the 4th electricity
Resistance, can also further include 3rd resistor and the 4th resistance, can be selected according to actual needs simultaneously, in the present embodiment, selection
3rd resistor and the 4th resistance this scheme are set simultaneously, low-frequency noise signal is isolated, as shown in Figure 3.
Optical module provided in this embodiment includes first resistor and first capacitor, second resistance and second in modulation circuit
Capacitor, and 3rd resistor is set between first capacitor and differential signal output plus terminal, and/or in the second capacitor and differential signal
It exports and the 4th resistance is set between negative terminal, when the differential signal output plus terminal of the laser emitter driving chip of optical module is low electricity
Flat, when differential signal output negative terminal is high level, first capacitor charging, the second capacitor discharges, and stimulated emission light device issues dim light；When
Differential signal output plus terminal is high level, and when differential signal output negative terminal is low level, first capacitor electric discharge, the second capacitor fills
Electricity, laser emitter issue strong light, realize the luminous power of modulation laser emitter, while passing through 3rd resistor and/or the
Four resistance are realized to low-frequency noise signal to isolation.
Fig. 4 is the schematic diagram for the optical module that the embodiment of the present invention three provides.As shown in figure 4, on the basis of above-described embodiment
On, for smooth signal or voltage, optical module provided in this embodiment further can also include filter circuit；
The filter circuit includes: the 5th resistance and third capacitor and/or the 6th resistance and the 4th capacitor；
Wherein, one end of the 5th resistance is connect with the anode of the laser emitter, the 5th resistance it is another
End is connect with one end of the third capacitor, the other end ground connection of the third capacitor；One end of 6th resistance with it is described
The negative terminal of laser emitter connects, and the other end of the 6th resistance is connect with one end of the 4th capacitor, the 4th electricity
The other end of appearance is grounded.
It optionally, can only include the RC filter circuit being made of the 5th resistance and third capacitor in the present embodiment, or
The only RC filter circuit comprising being made of the 6th resistance and the 4th capacitor；Or simultaneously comprising by the 5th resistance and third capacitance group
At RC filter circuit and the RC filter circuit that is made of the 6th resistance and the 4th capacitor.It should be noted that in the present embodiment,
The Standard resistance range of 5th resistance and the 6th resistance is 10ohm~150ohm；The third capacitor and the described 4th
The capacitance swing of capacitor is 20pf~300pf.The present embodiment is not particularly limited this.
Optical module provided in this embodiment includes first resistor and first capacitor, second resistance and second in modulation circuit
Capacitor, and 3rd resistor is set between first capacitor and differential signal output plus terminal, and/or in the second capacitor and differential signal
It exports and the 4th resistance is set between negative terminal, for smooth signal or voltage, be also provided with comprising by the 5th resistance and third capacitor
The RC filter circuit of composition and/or the RC filter circuit being made of the 6th resistance and the 4th capacitor.When the Laser emission of optical module
The differential signal output plus terminal of device driving chip is low level, when differential signal output negative terminal is high level, first capacitor charging,
The electric discharge of second capacitor, stimulated emission light device issue dim light；When differential signal output plus terminal is high level, differential signal output negative terminal is
When low level, first capacitor is discharged, the second capacitor charging, and laser emitter issues strong light, realizes modulation laser emitter
Shine power, while being realized to low-frequency noise signal by 3rd resistor and/or the 4th resistance to isolation, passes through RC filtered electrical
Signal or voltage in the smooth modulation circuit in road.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (6)
1. a kind of optical module characterized by comprising laser emitter driving chip, Distributed Bragg Reflection DBR grating,
Laser emitter, first resistor, first capacitor, second resistance, the second capacitor and power supply；
The laser emitter driving chip includes differential signal output plus terminal and differential signal output negative terminal；The differential signal
Output plus terminal and differential signal output negative terminal are used to export the differential signal of low and high level variation；
Wherein, one end of the first resistor is connect with the differential signal output plus terminal, the other end of the first resistor with
The power supply connection；One end of the first capacitor is connect with the differential signal output plus terminal, the first capacitor it is another
End is connect with the anode of the laser emitter；
One end of the second resistance is connect with differential signal output negative terminal, the other end of the second resistance and the electricity
Source connection；One end of second capacitor is connect with differential signal output negative terminal, the other end of second capacitor and institute
State the negative terminal connection of laser emitter；The negativing ending grounding of the negative terminal of the laser emitter and the DBR grating.
2. optical module according to claim 1, which is characterized in that further include 3rd resistor and/or the 4th resistance；
Wherein, the 3rd resistor is arranged between the first capacitor and the differential signal output plus terminal, the 4th electricity
Resistance setting is between second capacitor and differential signal output negative terminal.
3. optical module according to claim 2, which is characterized in that further include filter circuit；
The filter circuit includes: the 5th resistance and third capacitor and/or the 6th resistance and the 4th capacitor；
Wherein, one end of the 5th resistance is connect with the anode of the laser emitter, the other end of the 5th resistance with
One end of the third capacitor connects, the other end ground connection of the third capacitor；
One end of 6th resistance is connect with the negative terminal of the laser emitter, the other end of the 6th resistance and described the
One end of four capacitors connects, the other end ground connection of the 4th capacitor.
4. optical module according to claim 2, which is characterized in that the resistance value model of the 3rd resistor and the 4th resistance
Enclosing is 0ohm~15ohm.
5. optical module according to claim 3, which is characterized in that the resistance value model of the 5th resistance and the 6th resistance
Enclosing is 10ohm~150ohm.
6. optical module according to claim 3, which is characterized in that the capacitance of the third capacitor and the 4th capacitor
Range is 20pf~300pf.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510520810.4A CN106330333B (en) | 2015-06-30 | 2015-06-30 | Optical module |
| US15/087,261 US10122151B2 (en) | 2015-06-30 | 2016-03-31 | Optical module |
| US16/138,430 US10615573B2 (en) | 2015-06-30 | 2018-09-21 | Optical module |
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| CN201510375073.3A CN106330331B (en) | 2015-06-30 | 2015-06-30 | Optical module |
| CN201510520810.4A CN106330333B (en) | 2015-06-30 | 2015-06-30 | Optical module |
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| CN201510375073.3A Division CN106330331B (en) | 2015-06-30 | 2015-06-30 | Optical module |
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| CN106330333B true CN106330333B (en) | 2019-03-05 |
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| CN201510520810.4A Active CN106330333B (en) | 2015-06-30 | 2015-06-30 | Optical module |
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| CN106330331B (en) * | 2015-06-30 | 2018-08-21 | 青岛海信宽带多媒体技术有限公司 | Optical module |
| CN108055084B (en) * | 2017-12-28 | 2019-12-24 | 国网河南省电力公司信息通信公司 | Optical network signal enhancement transmitting circuit |
| CN113917622B (en) * | 2020-07-09 | 2023-04-14 | 青岛海信宽带多媒体技术有限公司 | Optical module |
| CN113693571A (en) * | 2021-08-30 | 2021-11-26 | 复旦大学 | Non-contact physiological signal monitor |
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Also Published As
| Publication number | Publication date |
|---|---|
| US20170005452A1 (en) | 2017-01-05 |
| US10008825B2 (en) | 2018-06-26 |
| US9601898B2 (en) | 2017-03-21 |
| CN106330331B (en) | 2018-08-21 |
| CN106330331A (en) | 2017-01-11 |
| US20170155228A1 (en) | 2017-06-01 |
| CN106330333A (en) | 2017-01-11 |
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